Sole Trader VAT: When Do You Have to Register?

VAT is one of the few things that can genuinely complicate life as a sole trader — but only once you reach a certain size. For most sole traders, the key question is simply: do I have to register yet? Here’s the answer, and what changes when you do.

The £90,000 threshold

You must register for VAT once your VAT-taxable turnover exceeds £90,000 in any rolling 12-month period — or if you expect to cross it in the next 30 days on its own.

Two things trip people up:

It’s based on turnover (your sales), not profit.
It’s a rolling 12 months — you check the last 12 months on an ongoing basis, not your tax year. Cross the line and you have 30 days to register.

Below £90,000, you don’t have to register at all — you don’t charge VAT and you don’t file VAT returns.

What changes once you’re registered

Registering for VAT changes how your business runs:

You charge VAT (usually 20%) on your sales
You can reclaim VAT on business purchases
You file VAT returns to HMRC, usually quarterly
You must keep digital records under Making Tax Digital for VAT

For a quick sense of the numbers, our free VAT calculator adds or removes VAT instantly.

Should you register voluntarily?

You can register below the threshold, but whether it’s worth it depends entirely on who your customers are:

Selling to VAT-registered businesses? Voluntary registration can make sense — they reclaim the VAT you charge, and you get to reclaim VAT on your own purchases.
Selling to the public? Registering early usually just makes you 20% more expensive than unregistered competitors, with no upside. It’s rarely worth it.

The Flat Rate Scheme

Once registered, the VAT Flat Rate Scheme lets you pay a fixed percentage of turnover rather than calculating VAT on every transaction. It cuts admin and can save money for low-cost businesses — but it isn’t right for everyone, so it’s worth comparing properly.

Approaching the threshold?

If your turnover is climbing towards £90,000, this is also a natural moment to ask a bigger question: is it time to consider a limited company? The two decisions often come up together.

Getting VAT registration timed and set up correctly — and on the best scheme — is exactly what our VAT returns service handles. If you’re not sure whether you need to register, our sole trader accountants will check your position and take it off your plate.

Frequently asked questions

When does a sole trader have to register for VAT?

You must register for VAT once your VAT-taxable turnover exceeds £90,000 in any rolling 12-month period, or if you expect to exceed it in the next 30 days alone. The threshold is based on turnover (sales), not profit, and it's a rolling 12 months — not your tax year.

Do sole traders pay VAT?

Only if they're VAT registered. Below the £90,000 threshold you don't charge or pay VAT unless you choose to register voluntarily. Once registered, you charge VAT on your sales, can reclaim VAT on business purchases, and file VAT returns to HMRC.

Can a sole trader register for VAT voluntarily?

Yes. You can register below the threshold, which can be worth it if you sell mainly to other VAT-registered businesses (who reclaim the VAT) or if you have a lot of reclaimable input VAT on purchases. If you sell to the public, voluntary registration usually just makes you 20% more expensive, so it's rarely worth it.

What is the VAT Flat Rate Scheme?

It's a simplified scheme where you pay HMRC a fixed percentage of your turnover instead of working out VAT on every transaction. It reduces admin and can save money for low-cost businesses, but it isn't right for everyone — we compare it against standard VAT for your situation.

How often do sole traders file VAT returns?

Usually quarterly, under Making Tax Digital for VAT, which requires digital records and software-filed returns. Each return and payment is due one month and seven days after the end of the VAT period.

Related services

Reviewed by Provense Accountants

Written and reviewed by our team of qualified accountants (AAT-regulated). This guide is general information, not personal tax advice — book a free consultation for advice on your situation.